From 5e2f3883aec016a1dd5b346f7e2e178d178fa4b1 Mon Sep 17 00:00:00 2001
From: Brooks Liu <github.haoliu@gmail.com>
Date: Tue, 8 Oct 2019 15:02:15 +0800
Subject: [PATCH] expression: implement vectorized evaluation for
 `builtinRealIsTrueSig` (#12517)

---
 expression/builtin_op_vec.go      | 24 ++++++++++++++++++++++--
 expression/builtin_op_vec_test.go |  1 +
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/expression/builtin_op_vec.go b/expression/builtin_op_vec.go
index 002aa0b9a2..c752acde41 100644
--- a/expression/builtin_op_vec.go
+++ b/expression/builtin_op_vec.go
@@ -408,11 +408,31 @@ func (b *builtinRightShiftSig) vecEvalInt(input *chunk.Chunk, result *chunk.Colu
 }
 
 func (b *builtinRealIsTrueSig) vectorized() bool {
-	return false
+	return true
 }
 
 func (b *builtinRealIsTrueSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
-	return errors.Errorf("not implemented")
+	numRows := input.NumRows()
+	buf, err := b.bufAllocator.get(types.ETReal, numRows)
+	if err != nil {
+		return err
+	}
+	defer b.bufAllocator.put(buf)
+
+	if err := b.args[0].VecEvalReal(b.ctx, input, buf); err != nil {
+		return err
+	}
+	result.ResizeInt64(numRows, false)
+	f64s := buf.Float64s()
+	i64s := result.Int64s()
+	for i := 0; i < numRows; i++ {
+		if buf.IsNull(i) || f64s[i] == 0 {
+			i64s[i] = 0
+		} else {
+			i64s[i] = 1
+		}
+	}
+	return nil
 }
 
 func (b *builtinDecimalIsTrueSig) vectorized() bool {
diff --git a/expression/builtin_op_vec_test.go b/expression/builtin_op_vec_test.go
index a36a83f40f..9b47bb8e8b 100644
--- a/expression/builtin_op_vec_test.go
+++ b/expression/builtin_op_vec_test.go
@@ -23,6 +23,7 @@ import (
 
 var vecBuiltinOpCases = map[string][]vecExprBenchCase{
 	ast.IsTruth: {
+		{retEvalType: types.ETInt, childrenTypes: []types.EvalType{types.ETReal}, geners: []dataGenerator{&defaultGener{0.2, types.ETReal}}},
 		{retEvalType: types.ETInt, childrenTypes: []types.EvalType{types.ETDecimal}, geners: []dataGenerator{&defaultGener{0.2, types.ETDecimal}}},
 	},
 	ast.IsFalsity: {